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Diversity, Distribution Pattern and Threat Status of Pteridophytic Flora in Shikari Devi Wildlife Sanctuary, Himachal Pradesh, India
The Protected Area (PA) is one of the in situ conservation measures adopted globally for the conservation of species, habitats and ecosystems. Shikari Devi Wildlife Sanctuary (SDWLS) is one of the diverse evergreen protected forests situated in Mandi district of Himachal Pradesh, India. Review of literature reveals that the SDWLS has not been explored for pteridophytic flora so far. Therefore, the present study was undertaken to document the detail inventory of the pteridophytes growing naturally at different sites of SDWLS. In this context, extensive field surveys were carried out to understand the diversity, distribution pattern and their threat status. The present study reveals total 105 species (100 ferns and 5 fern allies) belonging to 33 genera and 15 families. It represents about 95 % of the pteridophytic flora of Mandi district and 40 % of that of the state of Himachal Pradesh. Information on habitat and distribution within the study area along with their altitudinal gradient and herbarium numbers are also provided in this paper.
A Glimpse of Vegetation and Threatened Medicinal Plant Diversity of Govind Wildlife Sanctuary, Garhwal Himalaya
Govind Wild Life Sanctuary (GWLS), situated in Uttarkashi district of Uttarakhand, India, supports enormous plant diversity including several threatened plants of high medicinal value. Despite of legal protection this protected area is facing severe threat due to anthropogenic pressure, which in turn produces adverse natural pressure. The forest and vegetation types including some highly medicinal plants and their habitats in GWLS have been highlighted in the present study.
Relation of Forest Structure and Soil Properties in Natural, Rehabilitated and Degraded Forest
Plant community structure, species diversity and soil properties of natural, rehabilitated and degraded forests were studied in order to assess relationship of different forests structure and soil properties in upper Indo-Gangetic plain of Uttar Pradesh state of India. The composition of species, population bundance and importance value of the woody species were investigated in each forest; the representative soil samples from 30 cm depth of each forest were also analyzed for the soil properties. Dominant families at the natural forest are Moraceae (21.9%) and Rubiaceae (15.6%) while at the rehabilitated forest are Moraceae (53.8%) and Fabaceae (23%). In the degraded forest, the Moraceae and Fabaceae are dominant families occupy 33% each. These among forest community structure indicate that degraded forests are less complex ecosystems than natural forest stands.
Emergence of Spatial Patterns in a Simple Model of Wetland Ecosystem: Application to Keoladeo National Park (KNP), India
An attempt has been made to understand the spatiotemporal dynamics of good biomass, bad biomass and bird population in the wetland part of KNP. Spatiotemporal distributions of species biomass are simulated using the diffusivity assumptions realistic for natural wetland systems. Stability analysis, Hopf-bifurcation and diffusion-induced instability of the model system have been carried out. Computer simulations performed to identify various parameters for the good health of the wetland ecosystem. We observed that growth rate and carrying capacity for the bad biomass, carrying capacity and half-saturation constant of the good biomass are responsible for the good health of the wetland ecosystem. The spatial movements of good biomass acquires stable stationary patterns in the presence of bad biomass which performs swinging motion and selects a steady state spatial pattern, thereby ensuring the persistence as well as extinction of multiple species system in space and time.